<template>
    <div class="app-container">
        <div class="filter-container">
            <el-input :placeholder="$t('table.title')" v-model="listQuery.title" style="width: 200px;" class="filter-item" @keyup.enter.native="handleFilter" />
            <el-select v-model="listQuery.importance" :placeholder="$t('table.importance')" clearable style="width: 90px" class="filter-item">
                <el-option v-for="item in importanceOptions" :key="item" :label="item" :value="item" />
            </el-select>
            <el-select v-model="listQuery.type" :placeholder="$t('table.type')" clearable class="filter-item" style="width: 130px">
                <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name+'('+item.key+')'" :value="item.key" />
            </el-select>
            <el-select v-model="listQuery.sort" style="width: 140px" class="filter-item" @change="handleFilter">
                <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
            </el-select>
            <el-button v-waves class="filter-item" type="primary" icon="el-icon-search" @click="handleFilter">{{ $t('table.search') }}</el-button>
            <el-button class="filter-item" style="margin-left: 10px;" type="primary" icon="el-icon-edit" @click="handleCreate">{{ $t('table.add') }}</el-button>
            <el-button v-waves :loading="downloadLoading" class="filter-item" type="primary" icon="el-icon-download" @click="handleDownload">{{ $t('table.export') }}</el-button>
            <el-checkbox v-model="showReviewer" class="filter-item" style="margin-left:15px;" @change="tableKey=tableKey+1">{{ $t('table.reviewer') }}</el-checkbox>
        </div>

        <el-table v-loading="listLoading" :key="tableKey" :data="list" border fit highlight-current-row style="width: 100%;" @sort-change="sortChange">
            <el-table-column :label="$t('table.id')" prop="id" sortable="custom" align="center" width="65">
                <template slot-scope="scope">
                    <span>{{ scope.row.id }}</span>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.date')" width="150px" align="center">
                <template slot-scope="scope">
                    <span>{{ scope.row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}') }}</span>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.title')" min-width="150px">
                <template slot-scope="scope">
                    <span class="link-type" @click="handleUpdate(scope.row)">{{ scope.row.title }}</span>
                    <el-tag>{{ scope.row.type | typeFilter }}</el-tag>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.author')" width="110px" align="center">
                <template slot-scope="scope">
                    <span>{{ scope.row.author }}</span>
                </template>
            </el-table-column>
            <el-table-column v-if="showReviewer" :label="$t('table.reviewer')" width="110px" align="center">
                <template slot-scope="scope">
                    <span style="color:red;">{{ scope.row.reviewer }}</span>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.importance')" width="80px">
                <template slot-scope="scope">
                    <svg-icon v-for="n in +scope.row.importance" :key="n" icon-class="star" class="meta-item__icon" />
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.readings')" align="center" width="95">
                <template slot-scope="scope">
                    <span v-if="scope.row.pageviews" class="link-type" @click="handleFetchPv(scope.row.pageviews)">{{ scope.row.pageviews }}</span>
                    <span v-else>0</span>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.status')" class-name="status-col" width="100">
                <template slot-scope="scope">
                    <el-tag :type="scope.row.status | statusFilter">{{ scope.row.status }}</el-tag>
                </template>
            </el-table-column>
            <el-table-column :label="$t('table.actions')" align="center" width="230" class-name="small-padding fixed-width">
                <template slot-scope="scope">
                    <el-button type="primary" size="mini" @click="handleUpdate(scope.row)">{{ $t('table.edit') }}</el-button>
                    <el-button v-if="scope.row.status!='published'" size="mini" type="success" @click="handleModifyStatus(scope.row,'published')">{{ $t('table.publish') }}
                    </el-button>
                    <el-button v-if="scope.row.status!='draft'" size="mini" @click="handleModifyStatus(scope.row,'draft')">{{ $t('table.draft') }}
                    </el-button>
                    <el-button v-if="scope.row.status!='deleted'" size="mini" type="danger" @click="handleModifyStatus(scope.row,'deleted')">{{ $t('table.delete') }}
                    </el-button>
                </template>
            </el-table-column>
        </el-table>

        <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit" @pagination="getList" />

        <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
            <el-form ref="dataForm" :rules="rules" :model="temp" label-position="left" label-width="70px" style="width: 400px; margin-left:50px;">
                <el-form-item :label="$t('table.type')" prop="type">
                    <el-select v-model="temp.type" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name" :value="item.key" />
                    </el-select>
                </el-form-item>
                <el-form-item :label="$t('table.date')" prop="timestamp">
                    <el-date-picker v-model="temp.timestamp" type="datetime" placeholder="Please pick a date" />
                </el-form-item>
                <el-form-item :label="$t('table.title')" prop="title">
                    <el-input v-model="temp.title" />
                </el-form-item>
                <el-form-item :label="$t('table.status')">
                    <el-select v-model="temp.status" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in statusOptions" :key="item" :label="item" :value="item" />
                    </el-select>
                </el-form-item>
                <el-form-item :label="$t('table.importance')">
                    <el-rate v-model="temp.importance" :colors="['#99A9BF', '#F7BA2A', '#FF9900']" :max="3" style="margin-top:8px;" />
                </el-form-item>
                <el-form-item :label="$t('table.remark')">
                    <el-input :autosize="{ minRows: 2, maxRows: 4}" v-model="temp.remark" type="textarea" placeholder="Please input" />
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogFormVisible = false">{{ $t('table.cancel') }}</el-button>
                <el-button type="primary" @click="dialogStatus==='create'?createData():updateData()">{{ $t('table.confirm') }}</el-button>
            </div>
        </el-dialog>

        <el-dialog :visible.sync="dialogPvVisible" title="Reading statistics">
            <el-table :data="pvData" border fit highlight-current-row style="width: 100%">
                <el-table-column prop="key" label="Channel" />
                <el-table-column prop="pv" label="Pv" />
            </el-table>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="dialogPvVisible = false">{{ $t('table.confirm') }}</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
    import {
        fetchList,
        fetchPv,
        createArticle,
        updateArticle
    } from '@/api/article';
    import waves from '@/directive/waves'; // Waves directive
    import { parseTime } from '@/utils';
    import Pagination from '@/components/Pagination'; // Secondary package based on el-pagination

    const calendarTypeOptions = [
        { key: 'CN', display_name: 'China' },
        { key: 'US', display_name: 'USA' },
        { key: 'JP', display_name: 'Japan' },
        { key: 'EU', display_name: 'Eurozone' }
    ];

    // arr to obj ,such as { CN : "China", US : "USA" }
    const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
        acc[cur.key] = cur.display_name;
        return acc;
    }, {});

    export default {
        name: 'ComplexTable',
        components: { Pagination },
        directives: { waves },
        filters: {
            statusFilter(status) {
                const statusMap = {
                    published: 'success',
                    draft: 'info',
                    deleted: 'danger'
                };
                return statusMap[status];
            },
            typeFilter(type) {
                return calendarTypeKeyValue[type];
            }
        },
        data() {
            return {
                tableKey: 0,
                list: null,
                total: 0,
                listLoading: true,
                listQuery: {
                    page: 1,
                    limit: 20,
                    importance: undefined,
                    title: undefined,
                    type: undefined,
                    sort: '+id'
                },
                importanceOptions: [1, 2, 3],
                calendarTypeOptions,
                sortOptions: [
                    { label: 'ID Ascending', key: '+id' },
                    { label: 'ID Descending', key: '-id' }
                ],
                statusOptions: ['published', 'draft', 'deleted'],
                showReviewer: false,
                temp: {
                    id: undefined,
                    importance: 1,
                    remark: '',
                    timestamp: new Date(),
                    title: '',
                    type: '',
                    status: 'published'
                },
                dialogFormVisible: false,
                dialogStatus: '',
                textMap: {
                    update: 'Edit',
                    create: 'Create'
                },
                dialogPvVisible: false,
                pvData: [],
                rules: {
                    type: [
                        {
                            required: true,
                            message: 'type is required',
                            trigger: 'change'
                        }
                    ],
                    timestamp: [
                        {
                            type: 'date',
                            required: true,
                            message: 'timestamp is required',
                            trigger: 'change'
                        }
                    ],
                    title: [
                        {
                            required: true,
                            message: 'title is required',
                            trigger: 'blur'
                        }
                    ]
                },
                downloadLoading: false
            };
        },
        created() {
            this.getList();
        },
        methods: {
            getList() {
                this.listLoading = true;
                fetchList(this.listQuery).then(response => {
                    this.list = response.data.items;
                    this.total = response.data.total;

                    // Just to simulate the time of the request
                    setTimeout(() => {
                        this.listLoading = false;
                    }, 1.5 * 1000);
                });
            },
            handleFilter() {
                this.listQuery.page = 1;
                this.getList();
            },
            handleModifyStatus(row, status) {
                this.$message({
                    message: '操作成功',
                    type: 'success'
                });
                row.status = status;
            },
            sortChange(data) {
                const { prop, order } = data;
                if (prop === 'id') {
                    this.sortByID(order);
                }
            },
            sortByID(order) {
                if (order === 'ascending') {
                    this.listQuery.sort = '+id';
                } else {
                    this.listQuery.sort = '-id';
                }
                this.handleFilter();
            },
            resetTemp() {
                this.temp = {
                    id: undefined,
                    importance: 1,
                    remark: '',
                    timestamp: new Date(),
                    title: '',
                    status: 'published',
                    type: ''
                };
            },
            handleCreate() {
                this.resetTemp();
                this.dialogStatus = 'create';
                this.dialogFormVisible = true;
                this.$nextTick(() => {
                    this.$refs['dataForm'].clearValidate();
                });
            },
            createData() {
                this.$refs['dataForm'].validate(valid => {
                    if (valid) {
                        this.temp.id = parseInt(Math.random() * 100) + 1024; // mock a id
                        this.temp.author = 'vue-element-admin';
                        createArticle(this.temp).then(() => {
                            this.list.unshift(this.temp);
                            this.dialogFormVisible = false;
                            this.$notify({
                                title: '成功',
                                message: '创建成功',
                                type: 'success',
                                duration: 2000
                            });
                        });
                    }
                });
            },
            handleUpdate(row) {
                this.temp = Object.assign({}, row); // copy obj
                this.temp.timestamp = new Date(this.temp.timestamp);
                this.dialogStatus = 'update';
                this.dialogFormVisible = true;
                this.$nextTick(() => {
                    this.$refs['dataForm'].clearValidate();
                });
            },
            updateData() {
                this.$refs['dataForm'].validate(valid => {
                    if (valid) {
                        const tempData = Object.assign({}, this.temp);
                        tempData.timestamp = +new Date(tempData.timestamp); // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
                        updateArticle(tempData).then(() => {
                            for (const v of this.list) {
                                if (v.id === this.temp.id) {
                                    const index = this.list.indexOf(v);
                                    this.list.splice(index, 1, this.temp);
                                    break;
                                }
                            }
                            this.dialogFormVisible = false;
                            this.$notify({
                                title: '成功',
                                message: '更新成功',
                                type: 'success',
                                duration: 2000
                            });
                        });
                    }
                });
            },
            handleDelete(row) {
                this.$notify({
                    title: '成功',
                    message: '删除成功',
                    type: 'success',
                    duration: 2000
                });
                const index = this.list.indexOf(row);
                this.list.splice(index, 1);
            },
            handleFetchPv(pv) {
                fetchPv(pv).then(response => {
                    this.pvData = response.data.pvData;
                    this.dialogPvVisible = true;
                });
            },
            handleDownload() {
                this.downloadLoading = true;
                import('@/vendor/Export2Excel').then(excel => {
                    const tHeader = [
                        'timestamp',
                        'title',
                        'type',
                        'importance',
                        'status'
                    ];
                    const filterVal = [
                        'timestamp',
                        'title',
                        'type',
                        'importance',
                        'status'
                    ];
                    const data = this.formatJson(filterVal, this.list);
                    excel.export_json_to_excel({
                        header: tHeader,
                        data,
                        filename: 'table-list'
                    });
                    this.downloadLoading = false;
                });
            },
            formatJson(filterVal, jsonData) {
                return jsonData.map(v =>
                    filterVal.map(j => {
                        if (j === 'timestamp') {
                            return parseTime(v[j]);
                        } else {
                            return v[j];
                        }
                    })
                );
            }
        }
    };
</script>
